Extra Features

HTML Overlay

Overlay a custom browser source on your own screen!


This is a simple cross-platform app that runs in the background, allowing for a browser source to be displayed on the creator's desktop, creating an overlay on their own screen.

For example, the app comes preconfigured to show a simple dark splat that will cover most of the screen, (think Mario Kart oil spots) distracting them.

All you need to do is create a Channel Reward with the name SPLAT then relax and enjoy the distraction.

It also comes preconfigured to rain emotes down over the content on screen.

This feature requires the WebSocket Server to be enabled in your Streamer.bot application
Special thanks to Ruirize for the development.


Download the HTML Overlay application from and unzip the contents to your desired location.

HTML Overlay

Updated 2023-03-15

Do not extract directly into your Streamer.bot folder.
Any outside location or a subdirectory within your Streamer.bot folder is fine.


Open the extracted HTML Overlay directory and open HTMLWindowsOverlay.exe to start the application.

You will see a quick dark flash and then your desktop will return to normal.

The HTML Overlay application is now running!

You should also now see an accompanying icon your system tray.

You can close HTML Overlay by Double-Clicking the tray icon at any time.


Your Streamer.bot WebSocket Server must be enabled for the application to interact with your bot

Streamer.bot Connection

By default, the HTML Overlay will attempt to connect to your Streamer.bot WebSocket Server using the default settings, http://localhost:8080/.

If you have changed the host, port, or endpoint values of your WebSocket server, you can configure this by modifying the Content/index.html file within the HTML Overlay directory.

Included Overlays

The HTML Overlay zip above is preloaded with 3 overloay modules:

  • Splat!
  • Show Image
  • Emote Rain
You can customize the options for each module by modifying the Content/index.html file


Display a large paint splat on your screen.


  rewardTitle: "SPLAT". // Set your Twitch reward title you want to trigger this overlay

Show Image

Display any image (from a URL) on your screen.


  rewardTitle: "Show Image", // Set your Twitch reward title you want to trigger this overlay
  imageUrl: "https://streamer.bot/logo.png". // Set to the image URL you want to display
  seconds: 5, // Number of seconds to display the image
  width: "auto", // Set a custom image width, accepts CSS values
  height: "auto", // Set a custom image height, accepts CSS values

Emote Rain

Generate raining emotes from incoming Twitch chat messages.


  maxEmotes: 20, // Set to the max amount of emotes to accept from a single message
  emoteSize: "100px", // Set the size for the emote images on your screen

Custom Overlays

Custom overlays are an advanced use case and require JavaScript expertise

To get started, create a new js file inside the Content directory.

The configured Streamer.bot Client instance is available at window.client for interacting with Streamer.bot via WebSocket and subscribing to events

Here we are using the source of the included show-image.js as an example:

// Here we are defining default configuration options
// and then using window.getScriptConfig to fetch any user-modified values
const config = Object.assign({
  rewardTitle: 'Show Image',
  imageUrl: 'https://streamer.bot/logo.png',
  seconds: 5,
  width: 'auto',
  height: 'auto',
}, window.getScriptConfig(import.meta.url));

// Here we are subscribing to Twitch Channel Point Rewards
// and triggering our overlay when the configured title matches a redemption
window.client.on('Twitch.RewardRedemption', (message) => {
  if ((message.data.reward.title || message.data.title) === config.rewardTitle) {

Import your new module at the bottom of Content/index.html, after any existing <script> tags

<!-- Add this at the end, after any existing <script> tags! -->
<script type="module" src="my-module.js">
  rewardTitle: "Show Image" // Add your user config overrides here
Take a look at the existing modules in the Content directory for examples